Wanking Too Much

I am 15 years old and I have been wanking for about 10 of them. When I was younger I was always cumming after about five minutes, but now it takes about half an hour.

So when I was at home in my room watching some porn, having a good old wank, getting the best out of it, I hear the front door go. I didn't think anything about it until when I'm about to blow and I'm getting a tissue ready, my mum walks in and sees me sitting there with my dick in my hands. I was so embarrassed I wouldn't talk to her for weeks.